[Bug c/23805] No warning for uninitialized variable.

[mike at codeweavers dot com]

------- Additional Comments From mike at codeweavers dot com  2005-09-10 02:04 -------


char *foo(char **x) { if(*x) return x[0]; return 0; }
char *bar(void) { char *x, *y = 0; if(x) y = foo(&x); return y; }

/usr/local/gcc-4.0.1/bin/gcc -Wall -O2 -Wuninitialized -c tg.c

Give no warnings at all, even though x is used without initialization.

bash-3.00$ /usr/local/gcc-4.0.1/bin/gcc -v                                
Using built-in specs.
Target: i686-pc-linux-gnu
Configured with: ../gcc-4.0.1/configure --prefix=/usr/local/gcc-4.0.1
--with-gnu-ld=/usr/local/binutils-2.16.1/bin/ld
--with-gnu-as=/usr/local/binutils-2.16.1/bin/as
Thread model: posix
gcc version 4.0.1

bash-3.00$ uname -a
Linux black 2.6.13 #4 Mon Aug 29 12:35:27 KST 2005 i686 unknown unknown GNU/Linux

Slackware current, built gcc 4.0 myself to check gcc 4.0 warnings in Wine.


-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|4.1.0                       |4.0.1


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23805